brian_s30z

I do have a boost solenoid but per the psi I wanted 1bar, the springs are all that’s workingboost control. Hopefully cam adjustment will do the trick, once I fix leak and o2 sensor I’ll try to dyno again. But with cam adjustment I still think I’m a bit off. I’ve read folks with 9174 with unopened rb26 hit full boost low to mid 4K rpm

Hello all, I have a 1972 Datsun 240z with rb26 on an efr 8474 ewg with sinco custom dual 38mm tial and 3.5” exhaust. Unopened motor r33gtr rb26, has r35 coils, prp trigger kit, 180amp alternator, elite 2500, id1050x. Hks step 1 264 cams, adjustable cam gears( not adjusted). Had my first dyno tune with the car/engine a few days ago to 415rwhp and 352ftlbs of torque on 15lbs, USA dyno, 91oct. The concern I have is the time it takes to hit full boost on the efr8474, I’m not hitting full boost until 5,500rpm (15lbs no ebc, just wastegate springs). I was expecting this turbo to hit full boost around 7-800 rpm sooner at that boost level. I have a small vacuum leak and my wideband wasn’t working are the only issues I had... is there something possibly wrong or is this rpm boost expected with my setup?